Credit Losses on Financial Assets Measured at Amortized Cost - Aging of Automobile Loans Held For Investment (Details) - USD ($) $ in Thousands	Nov. 30, 2022	Nov. 30, 2021
Current Accounts
Financing Receivable, Past Due [Line Items]
2022 / 2021	$ 380,863	$ 391,366
2021 / 2020	255,412	142,210
2020 / 2019	76,841	125,580
2019 / 2018	66,338	68,852
2018 / 2017	31,269	31,147
Prior Years	13,291	12,041
Total	$ 824,014	$ 771,196
Percent	93.70%	96.20%
30 - 59 days
Financing Receivable, Past Due [Line Items]
2022 / 2021	$ 12,720	$ 7,387
2021 / 2020	15,550	4,444
2020 / 2019	4,307	4,330
2019 / 2018	3,380	2,979
2018 / 2017	2,020	1,472
Prior Years	1,097	698
Total	$ 39,074	$ 21,310
Percent	4.40%	2.70%
60 - 89 days
Financing Receivable, Past Due [Line Items]
2022 / 2021	$ 3,718	$ 2,613
2021 / 2020	4,156	1,586
2020 / 2019	1,090	1,620
2019 / 2018	734	616
2018 / 2017	569	305
Prior Years	181	157
Total	$ 10,448	$ 6,897
Percent	1.20%	0.80%
90 days and over
Financing Receivable, Past Due [Line Items]
2022 / 2021	$ 2,309	$ 829
2021 / 2020	2,031	612
2020 / 2019	504	498
2019 / 2018	539	240
2018 / 2017	248	44
Prior Years	59	61
Total	$ 5,690	$ 2,284
Percent	0.70%	0.30%
Total
Financing Receivable, Past Due [Line Items]
2022 / 2021	$ 399,610	$ 402,195
2021 / 2020	277,149	148,852
2020 / 2019	82,742	132,028
2019 / 2018	70,991	72,687
2018 / 2017	34,106	32,968
Prior Years	14,628	12,957
Total	$ 879,226	$ 801,687
Percent	100.00%	100.00%